Lubricator



J. ERICKSON.

I LUBRICATOR.

APPLICATION FILED JULY 8, 1920)- I 1,359 ,584, Patented Nov. 23, 1920.

a A 8 1L- 9 73 72/ 1% 75 5 .Z w a in! my! a To all whom it may concern;

' is to provide 'means whereby seepage of the UNITED STATES PATENT JOHNERICKSON, or MADISON,

O'FFLICE.

WISCONSIN, AssIGNon -zro MADISON KIPP CORPORA- TION, OF MADISON,WISCONSIN, CORPORATION'OF WISCONSIN.

LUBRICATOR.

Specification of Letters Patent. I Patented NOV. 23, 1926.,

9 Application filed July 8, 1920. Serial 1%. 394,686.

Be it known thatI, JOHN ERICKSON, a cltlz'en of the, United States,residing at Madison, in the county of Dane and State of Wisconsin, haveinvented certain new and useful Improvements 1n Lubrlcators, of'

which the following is a specification.

This invention pertains to lubricators and more particularly to theforce-feed type wherein a piston is employed to draw the charge from areservoir (or the like) into a cylinder, and to eject the sametherefrom.

The main object of the present invention lubricant past and in rear ofthe piston is prevented as the piston is moved or forced ings, wherein:

v moved forwardly or Figure 1 is a longitudinal sectional view of alubrictor with the piston in its retracted position;

Fig. 2 a similar view with the piston tion stroke; and

Fig. on the linen-a of Fig. 7

In the drawings 1 denotes a cylinder surmounted by a reservoir 2 whichis in communication with the cylinder through a port 3. The outer end ofthe piston is indirect communication with a discharge port 4.

which opens into a discharge chamber 5 formed within the exteriorlythreaded nipple. 6. Port 4 is normally closed by a nons returncheck'valve 7 held to its seat by a spring 8 the outer end of whichtakes against a perforate washer 9.

however, be omitted as its sential to the present invention.

The piston is'denoted ating stem or rod 11. extends outwardly therefromthrough a bushing 12, the stem preferably having a handle 13 securedtherethe lubricant to the rear same in a very simple at the end of itsejec- I a transverse vertical sectional view 1 Such valve may, presenceis, not esby 10, andits operthe stem, bearlng at one end on the pistonand at .its opposite end against the bushing 12,and serving. to. forcethe piston to the right to effect the ejecting stroke- Such spring isnot, however, essential as the piston may be actuated manually withoutthe aid of the spring. I I

The inner wall of the cylinder 1 is provided with an interior groove orchannel 15 which extends around said 'wall or face, the groove openingor terminating in theintake ort 3. This groove or channel, which may hereadily tooled in the face of the cylinder, is preferably located sothat it opens into the to. A spring, as'14, is shown as encircling rearportion of the intake port 3 and provldes means whereby seepage orforcing of of the piston or plunger 10 is precluded or done away with.

In action and with the parts in the position shown in Fig. 1, the pistonor plungerv is shown as drawn to the left, in which posi tion the port 3is uncovered and a charge of lubricant passes into. the forward end ofthe cylinder in advance of the piston. Upon an of the piston eitherunder inward movement the action of spring 1 1 or by pressure applied.to handle 13 (or both), thelpiston passes under port 3 closing thesame,and then forces the entrapped lubricant through port 4, past valve7 andvto theelement to be lubricated. During such forcing movement thelubricant, especially if it be a light one, will, to a greater or lessextentbe forced rearwardly along the peripheral face of the piston, and,with the ordinary construction,

such lubricant would pass to the left of the piston and into the spacethrough which the stem or rod 11 extends, from whichspace it wouldultimately be forced onto the hand of the operator. With the provisionof the channel 15 such rearward seepage is arrested, any rearwa'rdlytraveling lubricant passing into the channel and thence back through thefeed port 3 to the reservoir or other source of supply.

By this simple arrangement the use of packing rings on the piston orplunger, or

the necessity of any packing gland or stufling box about the actuatingstem or rod, is done awa with.

aving thus described my invention what I claim is 2- 1. In a lubricatorthe combination of a cylinder having a discharge portand a laterallyopening intake port; and a, piston .7 stroke of the mounted for movementin said cylinder, said piston having an amplitude of movement such thatit opens the inlet port on the intake stroke of the piston and closesthe same during the initial movement of the piston on the ejectingstroke, said cylinder having a channel formed in its face, said channelopening into the inlet port.

2. In a lubricator the combination of a cylinder having a discharge portand an intake port; a plston mounted for reciprocation in said cylinderand acting as a valve for said inlet port; and means for conducting anylubricantwhich may be forced rearwardly along the piston during theejecting latter to the intake port.

3. In alubricator the combination of a cylinder having a discharge portat one end thereof; a reservoir in communication with the cylinderthrough an intake port spaced to the rear of the discharge port, saidcylinder having a groove formed in the inner face thereof and openinginto the intake port; a piston mounted in the cylinder, piston acting asa valve to close the intake port upon the ejecting stroke of the piston;and a rod extending from the piston to the it outside of the cylinder.

In testimony whereof I have signed my name to this specification.

JUHN ERICKSON.

